Arduino Issue: I cannot run any of my code. 'To create a new connection, clear the existing object.'
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William Rogers on 15 Oct 2020
Commented: Rohan Kale on 16 Oct 2020
I have only just begun to learn how to work with arduinos in matlab. My code will not run past the third line, so here are the first few lines:
ard_UltraS('COM4', 'Mega2560','Libraries','Ultrasonic') = arduino;
Matlab gives an error at the third line:
"MATLAB connection to Mega2560 at COM4 exists in your workspace. To create a new connection, clear the existing object."
I have tried clear all, clearvars, clearing that specific variable, restarting matlab, restarting my computer, and different USB ports. With each of these attempts i get the same error. Is there anything to clear the variable I haven't tried? or some way to make sure that the arduino is disconnected?
Rohan Kale on 16 Oct 2020
The construct of the syntax "ard_UltraS('COM4', 'Mega2560','Libraries','Ultrasonic') = arduino;" is not supported for creating an arduino object.
Please use the following syntax instead:
>> ard_UltraS = arduino('COM4', 'Mega2560','Libraries','Ultrasonic');
>> ard_UltraS = arduino;
Refer to the MATLAB documentation page on creating an arduino object.
Hope it helps.
Arun Kumar on 16 Oct 2020
Please refer the following page for correct syntax of the command.
Hope this helps!
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